Testing system, process, and machine



A. B. HAZARD;

TESTING SYSTEM, PROCESS, AND MACHINE. v

APPLICATION FILED my 1 3. 1911.

Patented May 25, 1920.

I2 SHEETS-SHEET Allen B. Haza rd A. B. HAZARD.

TESTING SYSTEM, PROCESS, AND mcnms.

APPLICATION FILED JAN. l3, I9". L

1mm May 25,1920.

' l2 SHEETSSHEET 2 49 1 Even???- flllen Bliazard A. B. HAZARD.

TESHNG SYSIEM, PROCESS, AND MACHINE.

APPLICATIUN FILED OM13, I9l7.

Patented May 25, 1920.

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lllllllllllvllil I. I I l l \i! frwen or flilen BHazard A. B. HAZARD. TESTING SYSTEM, PRocEss, AND MACHINE.

APPucmon FILED me. 13. m7.

Patent/ed May 25,1920.-

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TESTING SYSTEM, PROCESS, AND MACHINE. APPLICATION Hm: m4. l3. IBH.

1,341,463. Patented May 25, 1920.

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Inz/erfior filler? Blizzard A. B. HAZARD. TESTING SYSTEM, PROCESS, AND MACHINE.

APPLICATION FRED JAN. 13, I917.

Patented May 25, 1920.

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Jizi/en or 1111912 BJfazard bu M in an an a QM LP a fiumw E I 38w w s Q at 9 flow 2m NE 05 0 m 0 E a $3 4%. a E E ohNnw A. B. HAZARD.

TESTING SYSTEM, PROCESS, AND MACHINE.

ArPucAnou min m1. :3, 1911.

1,341,463, Patented May 25, 1920.

2 SHEETS-SHEET B.

fiat/872707 flllen BHazard A. B. HAZARD.

TESTiNG SYSTEM, PROCESS, AND MACHINE.

APPLICATION mzo JAN. la. I917.

1,341,463. Patented y 25, 1920.

I2 SHEETS-SHEET 10.

Im'erzwr filler: BHaza rd A. B. HAZARD.

TESTING SYSTEM, PROCESS, AND MACHINE. APPLICATIQII mm um. 13, m1.

1,341,463. .Pqtanted May 25, 1920.

I2 SHEETS-SHEET II- A. B- HAZARD. TEST-ING SYSTEM, PROCESS, AND MACHINE.

APPLICATION FU-ED JAIL 13, 19". 1,341,463. Patented May 25, 1920.

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.To all whom it may concern." e Be it known that I AnnnuiB'. H m, a citizen of the UnitedtateS esi 'WYB, in the county 11 inc ful Improvements in Testing syssms Procasses, and Machines, of which th following is afull, clear, concise, d vtion.. y

This invention testing 7 'mfore particuia for . recto. of pa testing whole and the ferentparts thereof. v

The s ecific' embodiment of the invention herein i ustrated and described is di to a system, pr muticall J These b ocks'arensed in 'tective devices and serve in ,a suitable dielectric to prote t the apparel; from the cha - occasionally-impressed upo The carbon blocks are devices in pairs, one

pair beingJconn the faces of each-bl is" of these blocks is fusible alloy.

block are moun tective apparatus and are separa d1electric.

rent is imp tial will jum notwithstanding the dielectric, and if enough it will melt rmenently connect sin lground throuh the In order function carefully able variation from being very mi been the custom inspections and an ex E NT OFFlCE 7 mm, more, asslouon 'ro wnsrnnu nnnc'rmc 31123, nlcorrons'rnn, or new roux, u. r., s. conronerrou or new rnsrnre srsrnm, rnocnss. um nscnrnn.

Specification of Letterl'Patent. Patented May 25, 1920.

Ap lication med January 18, 1917. serial no. 149.177.

' cient operation. It is the object of this invention to provide a system, process and machine that will entirely displace this manual inspection ofthe blocks containing the central disk of fusible alloy. The invention is not limited in its application, however, to the testing of carbon blocks, as other embodiments thereof are contemplated for making similar tests on other articles.

One of the features of this invention con sists in means for detecting the presence and the position of the fusible alloy in the block and means for guiding the blocks so that they will be presented to the test plate with ground or alloy side u Another feature relates to means for testing the conductivity of the blocks as a whole and eliminatin those blocks which fail to meet the spec' ed conductivity.

7 Another feature relates ocess, and machine for auto" for testin testing carbon blocks an eliminating highpotential pro- .fall between connection with and minimum limits. *1

y Still another feature resides in a device destfiutive action of ligh 4 .e; for checking the degree of perfection of the andlother whic l10- 'plen'e or ground surfaces and eliminating n line conductors. those blocks which have a concave or convex used in the protective surface greater than the prescribed miniof the blocks of eachv mum.

to the line circuit and additional feature of the invention und. One of the surconsists in an ilnprov' means for counting I ground to present a and distributing the blocks after they have flat surface, and in the center of one been secured a circular disk .of With these and other objects in view, the

The und surfaces of the invention consists of the apparatus herein we to face the proillustrated and described and pointed out ted b the in the appended claims.

The invention is illustrated in the accompan 'ng lch:

at Berof-Gook end tabs of certain new an useis, have invented and exact escnprelates to an improved system, process, and machine, and

r1 to a process. and machine inspecting t e hysical dimensions of lar articles or checkifigthe de action of their: plane so sees an for conductivity of'the articles use relative conductivity of difhigh potentia other lock to Whenever a high potentia curupomthe line,-the potenfrom one block to the other, segiaration due to the sari potential is high the fusible alloy-and 'd line wire to t thecliljiihoii blocks. l

001m r p y as above described, they.

d, the allowdrawings in wh re 1- is ajside elevation of a complete machine embodying the features of this invcntion;

Fig. 2 is a top hopper A mechanism this invention;

Fig. 3 is a section on the line 3-3 of elevation of an improved which may be used in tested and inspeei sgecified requirements ute. thas consequently in'the past to conduct these tests manually, and this was tedious, and

4 shows plan of an-improved mochanism used'in'this invention for removing the blocks from the magazine; 406

Fig. 5 is a side levat1on of a portion thereof, as indicated by the line 5-5 in Fig. 4; x

ingly expensive,

Fig. 6 represents a top plan view on the line 66 of Fig. 1 of the driving means for the mechanism illustrated in F1 2;

Fig. 7 exhibits a plan elevation of the alloy testing means;

g. 8 is a vertical section on the line 88 of ig. 7 looking in the direction of the arrows;

Fig. 9 is a plan elevation of the conductivity testing means and its associated identification mechanism and the gaging mechamm;

Fig. 10 is a vertical section of the-conductivity testingmeans on the line 1010 of ig. 11 is a horizontal section on the line 1111 of Fig. 10 and shows the conductivity tasting springs projecting through the test p ate;

Fig. 12 illustrates a side elevation of the ga ing mechanism; 7

ig. 13 is a vertical section on the line 13-13 of Fig. 12 looking in the direction of the arrows:

Fig. 14 shows a plan of the of the gaging mechanism taken on the line 1414 of Fig. 13 looking in the direction of the arrows;

Fig. 15 is a vertical section on the plane of Fig. 9 and illustrates the gate utilized forrejecting defective parts and its associated operating means;

Fig. 16 exhibits a plan view of thegate illustrated in Fig. 15; i Fig. 17 is an and elevation of cation mechanism shown in Fig. 9,

Fig. 18 is a vertical section on the line 1818 of Fig. 17;

Fig. 19 represents a plan elevation of a portion of the surface gaging means;

Fig. 20 is a vertical section on the line 2020 of the entire surface gaging means;

Fig. 21 is a horizontal section on the plane 21-21 of Fig. 20 which illustrates the relative position of the operating levers which lf'lOld the block against the plane testing surace;

Fig. 22 is a horizontal section on the plane 22-22 of Fig. 1 and illustrates the distributing mechanism;

Fig. 23 is a diagrammatical illustration of the power distributing s stcm;

ig. 24 is a circuit iagram illustrating the conductivity testing system;

Fig. 25 is a circuit diagram of the gaging system;

Fig. 26 is a circuit diag'. am of the surface testing system;

Fig. 27 is a testing system;

ig. 28 is a circuit diagram of the countand distributing system, and ig. 29 is a circuit diagram of the power :ystem illustrating the protective devices the identificircuit diagram of the alloy utilized therewith.

movable :ifivers The machine in the form here illustrated consists essentially of seven parts, -as illustrated in Fig. 1, namely, the hopper and bucket feed system and the associated means for eliminating broken parts matter designated as 30; the magazine and the mechanism for periodically removing the blocks one at a time from said magazine to the testing system 31; the alloy testing mechanism 32; the conductivity testing mechanism 33; the gaging mechanism 34; the surface testing mechanism 35, and the counting and distributing mechanism 36. To facilitatethe following description, each one of these parts will be described separately in the order mentioned, following which a general description of the operation of the machine as a whole will be given in which the correlation of the various parts of the machine will be described.

he hopper and bucket feed mechanism and its associated parts is illustrated in Figs. 2 and'3. As there indicated, the mechanism is supported on uprights preferably of angle iron such as 37 and 38. The hopper roper 39 and its associated parts is made 0 sheet iron and comprises a receiving trough 40 having an inclined bottom into which the carbon blocks which are to be tested are dumped promiscuously. The ho per 39 will hold approximately 10,000 bloc and has its bottom 4.2 inclined so that the blocks will be fed to the buckets of the carrier system by the force of gravity. The bucket or carrier system comprises two endless chains 43 and 44 which are carried by a series of sprocket wheels such as 45 and 46 mounted on shafts that extend all the way across the machine. These sprockets act as idlers and the chains are driven by a pair of sprocket wheels mounted on the shaft 50 which is driven from a motor by a power transmission system to be described hereinafter. Mounted between the two engdless chains is a series of U shaped buckets such as 51 which function to pick up the blocks a few at a time from the hopper, as these buckets are pulled bv means of the chains through the delivery movement across said the top of the hopper, a perpendicular drop, and a horizontal movement underneath the hopper. This movement of the buckets 51 causes them to pick carbon blocks-on an average above five-as the buckets make the perpendicular rise and foreign '7'0 up a plurality of the- 1,s41 ,4es I e a through the delivery hopper 49'. When the 'slot 58 parallel to the direction of movement buckets pass up the inclined rise an blocks of the buckets has been provided. The slot which are resting loosel on said buc ets and is considerably wider than the lon dimenare, therefore, not wel lodged within the sion of the block, and consequent y when buckets will fall back into the hopper. This a chipped block pushes other blocks toward inclination is rovided for this purpose so. the center of the plate these blocks will fall that these bloc will not cause trouble by through the slot 58 backinto the hogper 39. catching between the top .plate and the sides This is illustrated by the chille r block of the bucket. As the position of the bucket 25. Chipped blocks, however, will move I 10 chan es from the inplined path to the horialong the edge 'of the diagonal slots 56 and zonta path the blocks within the bucket fall 57 until the reach the ends thereof, where out upon the broken block and foreign mathey will, fa 1 into .the chute 63 from where terial eliminating device or top test plate they will slide into either one of the reject and the blocks are then pushed ahead of the pans 60 or 61. a 15 buckets across said late. The purpose of As indicated in Fig. 2, the chute 63 is the broken block an foreign material slim rovided with a V' shaped open ng and inating'plate is to remove all broken blocks shpulder 64 which prevent the fouled locks and foreign materialwhich is picked up. by from. fallingI into the h per, but forces the buckets, so that these parts will not be them down't e chute 63 in the reject pan. 1 delivered to the test s stem in which they The slot 58 is cut out at 65 and 66 50 that would create considera letroubl'e. gpod blocks, which are being propelled by The top test plate consists of four ieees t e buckets and which are located on the 'of'flatsheet iron plate" 52,53, 54:,and 5, so lates 52 and 53 so that a portion of their plllacedwith respect to one another above length projects into the slot 58, will not 25 t e hopper as to form two diagonal slots be carried'along by these buckets to the 56 and 57 and one slot 58 which is arallel pointed end of these two plates and there to the direction of movement of the uckets dropped into the reject chute 63. Blocks and located in the center of the test plate. thus located when they reach the cut-oif The diagonal slots 56 and 57 are so posiportions 65 and, 66, as illustrated by block 30 tioned that nothing can cross the plate with- 24, will be dro ped back into the hopper 39.

out first crossing. eitherone of these slotsh As hereinbe ore stated, all blocks which The width of these slots and the angle rest on either one of their top or bottom formed between them and the direction of fac'es will span the slots. When the blocks travel of the buckets is such that all broken fall from the bucket onto the plate some 5 blocks and foreign material, such as the come to rest on theirtop or bottom faces broken blocks 28 and 29 illustrated. in Fig. and others on their side faces. All blocks p 2, will fall into these slots. Under these which come to rest on their side faces must slots are, located the pans 60 and 61 for be tipped over 'onto' their top or bottom catching. this'material. Unbroken blocks, faces so that they will be roperly delivered" 40' such as 27 for example, which are to a magazine feed belt To accomplish on either their top or bottom faces w this a slight drop of about of an inch is span and crossover the slots as they are I Brovided at 67, as indicated in Fig. 3. ushed alo by the buckets. However, an locks on-their top or bottom faces locks whic have their corners chipped o pass over this drop and retain their same 5 such as 26, and which are pushed across the position, whereas all the blocks which rest test plate with the chippedcorner on the on either one of their side faces will be advancing side of the block, will neither tipped onto either their top or bottom face span nor fall allof the way into the slots, as they pass over this P-. but the chipped portion of such blocks will When the blocks have been pushed across so catch in the slot and move aloozlg'on the the broken block and foreign material elimiall edge-of the'slot as it is adv by the nati' lplate, they drop onto a horizontal bucket. The chipped blocks which catch in belt ocated .at the end of the late. This either of the diagonal slots 56 and 57 will belt is constantly movin an feeds the consequently be carried diagonall across blocks into a-magazine. the blocks fall 65 the face of the plates 55 and 54 as t e ride from the plate they make a turn of a quaron the edge of the slots'56 and 57 n this 'ter of a revolution and come to rest on the movement the chipped blocks which are thus belt on one of their side'facesand are fed caught will, ush'ggod blocks, that are be-' in this tlon into the magazine. Any

ing propelle by. t e same bucket, toward blocks w ch reach the end of the top plate so the center of theplate. If the bucket which and which miscarry and are not lodged onto 1% y is repelling the chipped blocks is a ,pro- 7 the horizontalfbelt'68'drop on the verticall "pa ing a-number of (1 blocks, this'action inclined chntei69', on which they will all e of the chipped bloc misled resultin theback intofithej hopper 89. The horizontal f, jamming of the b endIess'beItiBS, as clearly indicated in Fig. ,1 side of the hue To prevent 1, 1s mountedop the pulleys 70 and 71. The is When the top of the and 5, consists of a circular disk 73, free blocks fed to the belt 68 are moved along and fed to the magazine 72, which consists of an inclined trough down which the blocks move by-the force of gravity. The blocks are fed into this magazine end first on their sides with the top or alloy face either to the right or left and are d in this position by the sides of the ma zine.

block is hereina r referred to in specification, in order to facilitate the description, it will be understood that the surface of the block in which the fusible alloy is located is the one designated. The magazine functions to hold the blocks in readiness for testing from which they are delivered to the testing system at regular intervals in accordance with the rate established for the machine at which the blocks can be conveniently tested. The magazine is necessary because the buckets do not function uniformly, that is, they do not pick up blocks in the same quantities. Thus one bucket may ride through. the delivery cham ber 49 without picking up a single block, and another bucket may pick up as many as ten blocks. Thus the magazine com ensates for the unsteady feed of the buc ets by storing up the blocks when they come to it faster than they are removed and by feedin out the stored blocks when the bucket fee falls below the magazine feed.

Located at the end of the magazine 72 is a device for moving the blocks from the magazine one at a time and delivering them to the testing system one at=a time. This mechanism, as clearly illustrated in-Fi 4 to turn about its center and mounted at the same angle to the horizontal as the magazine, as shown in Fig. 5. The disk 73 is moved periodically through an angle of 90 degrees by the action of a cam 74 and its associated mechanism, .shown in Fig. 6. A roller secured to a rod 75 rides on the cam 74, one end of said rod being pivoted at 76 and the other end thereof being secured to the rod 77. Secured to the lower end of the rod 77 is the link 78, one end of which is pivotally secured to the rod 77 at 79 and on the other end ofwhich is pivotally secured 'the ratchet 80 which is pivoted at 81. The

link 78 is loosely mounted on the shaft 82, to which is secured the disk 73 and the ratchet wheel 83. Pivotally secured to the frame 84 of the machine at 85 is the centering and retaining pawl 86. The roller in the rod 75 is held against the surface of the cam 74 by the spiral spring 87 and the ratchet 80 is held in contact with the ratchet wheel 83 by the spiral spring 89. The spiral spring 90 controls themovement of the retaining pawl 86. Consequently when the shaft 91 is turned, the cam 74 in each revoluton will impart to the rod 75 a reciprocating motion. On the upward stroke of each one of these reciprocations, which is the position indicated in Fig. 6, the pawl 80 will engage a tooth of the ratchet 83, and on the downward movement of the rod 75 the rod 7 7 will turn the link 78 about the axis 82, thereby causing the pawl 80 to turn the ratchet wheel 83 through an angle of 90 degrees. The amount of this movement is controlled by the retaining and centering pawl 86 which is depressed b a suitable projection on the link 78 and which will, therefore, ride on the surface of the ratchet wheel 83 until the tooth of the retaining pawl 86 falls into one of the depressions 93 located 90 degrees apart on the surface of the ratchet wheel 83 and which then serves to counteract the action of the spring 87 and thereby prevents further movement of the rod '75 and its associated mechanism. The turning of the ratchet wheel 83 will turn the shaft 82 and likewise the disk 73 through an angle of 90 degrees, and the retaining and centering pawl 86 is adjusted so that each movement of the disk 73 will bring a pair of the carbon block slots or holders 94, 95,

96, or 97 into direct alinement with the magazine 72 and the guiding slot 98 which leads to the alloy test plate.

It will consequently be evident that each time the disk 73 is turned, a carbon block holder is brought directly in front of the magazine so that a block may fall from the magazine into the holder and at the same time a block located in the holder diametrically opposite to the one receivin the block will fall from its holder into the s ide slot 98 and from there on to the alloy tes t plate. Due to the inclination of this disk the blocks are fed to and from the same by the force of gravity. As into the holder is carried away from the magazine, the following block in the maga zine will slide down and, strike the upright peripheral other blocks in the magazine, due to the wall 100,.will, therefore, be held back until the next carbon block holderis moved into a position directly in front of the magazine.

Located at the end of the magazine is a gate 101 which is pivotally mounted on the pin 102 and which is used to prevent a block falling part way into the holder at the moment that the disk starts to move, which action would result in the breaking of the blocks. The gate is normally held open by the action of a sprin' or in any other suitablenianner, and is cosed by any one of the links 103, 104, 105, and 106 Whlch are provided with arcuated surfaces at their outer periphery which swing intothe path of the gate-and move the gate with it to close the magazine, providing there is no block protruding from the end of the magazine at the time that the disk 73 stops. Associated with each one of these links 103, 104, 105, and 106 each block that is dropped wall 100 of the disk 73, and the '"are the arms 107, 108,109, and 110 respecing stem, the blocks being delivered from tively which are provided with'a curved surthe a oy test plate to the plate of the conface concentric to the outer periphery of the ductiviti system by means of chutes located dlsk 73.1,Either one ofthese arms will hold below t e alloy test plate. As the blocks v 5 the gate plosed until the holder .is moved leave the chute 98 and slide onto the test awayfronithe magazine and hence prevents plates, there is an-ocasibnal tendency for any the holder wh1ch may one of the blocks to jump, and this action is come down theme sine after the disk has counteracted by the s rmg 131. The block 'come to 11f a'i lock is .protrudjnglfrom is next moved along hetween the retaining 10 the 'end of the magazine when the older walls 120 and 121 by one of the pins in the arrives in front ofsaid ma zine the gate chain 123 and is first connected to the conwill not be close due to t e. presence of tact spring 132, then to the contact springs said block, and t e arcuated surfaces of 133, 134, 135 and 136 and finally to t e either one 'thelinks 103,104, 105, and 106 contact spring 137. These contact, springs, 15. will be de res'sed toward the outer periphery to ether with a block, establish various c1rof the 7 3. against the tension of either cults which determine the subsequent movethe spiralsprings 111, 112, 113, and 114 rement of the blockon the allo test plate. spectively. y The contact springs 132 and 1 7 are so 10- V v The carbon blocks are readily retained in cated that they will simultaneously make 2 0 said holders by the force oi gravity. while contact with a block'for only a very short 5 they are rotating through the'upp'er uadinterval of time, and they are located with rant, and to prevent the blocks rom' eing reference to the springs 133, 134, 135, and dropped out ofsaid holders during the rota- 136 so that'said period of simultaneous con- 7 tidn through the lower quadrant, the sheet tact will occur at the time that the springs 25 metal are 115, concentric with the outer e- 133 to 136 inclusive are-making contact with riphery of the disk 73, is provided for t is a small portion of the block located exactly lower quadrant which serves to retain the in the center, that is, either one of the paired carbon blocks in the holders until the disk springs 133 and 134 or 135 and 136 will 7 3 has been revolved to a position where the make contact with the circular disk of soholder. -will be in alinement with the slide fusible allo rovided the same is properly ehute"98. locatedint e lock. The paired sprin The carbon block' in the holder in alineand 134 and 135 and 136 function to etect ment with the chute 98 will slide down said the presence or absence of the alloy and also chute .and be delivered to the plate of the serve to locate the side of the block in which 35 alloy test mechanism illustrated in Fi 7 the alloy is embedded, determine whether or 100 and 8. The blocks will be delivered gr iom not the surface of the alloy is clean, so as the holder in such a mannerthat they will to (give the required de res of conductivity, rest on said plate on one side or the other an likewise to test the ocation of the alloy with the'alloy face of the block either to in theside and to determine that it is not 40 the right or to the lett. The block will be too far fi c held between the guiding or retaining walls n The electrical tests made by these springs v and 121 of the alloy test plate and will I are dependent upon the fundamental princirest directly above aslot- 122 in said'plate. pic that the contact resistance between the Directly beneath this slot 122 is an endless sprin s and the carbon block varies very 45 chain 123 which is mounted on the driving consi erably with very slight variations in 1 0 sprocket wheel 125 and theidler sprocket the pressure. between the carbon and the 124, said sprocketsbeing mounted on the springs" whereas the contactresistance beshafts '126 and 127 respectively. This chain twen t e springs and the alloy varies conis equip with three pins 128 129., and siderably less with a similar amount of 1 g 50 130, sal pins projecting through the slot variation in pressure. Therefore, by prop- 11- 122 and protruding above thesurface of erly adjustllii the pressure between the the testplate and function ush theblocks springs and e carbon block it is possible between the retaining wal v and 121",to "to so control the operation of a relay that the operating elements of" e alloy testing it will 0 erate when the springs make-con- 55 mechanism. u tact wit the alloy and will remain inert 120 The alloy testingmechanism functions to when thespripfi'e make contact with the eliminate blocks-in which the alloy is either carbon block. e contact springs 132 and missing, orfails tomeet the specified con- 137serv'e to aid the aired springs 133 and ductivity requirements, or in which the alloy 134, and 135 and 136 in detecting such block: so is not centrally located. It likewise funcin which the alloy is not centralgg located 125 tions to deliver the blocks to'the obnducin the block. This is accom lifih by contivity testing mechanism with the top face' trolling the circuits which in u ethe paired of the block turned u and for this purpose :prings 133' and 134, and 135 and 136 by the allo. test plate is coated aboutsix inches eetromagnetic operated means which are e5 abovet e test plate of the conductivity testactuated only at the time that the paired l of the circuit.

springs are making contact with that portion of the block in which the alloy should be located. The springs 133, 134, 135, and 136 are included in circuits which control relays which in their turn control other relays and the electromagnetic gate operating devices 138 and 139. hese e ectroma nets 138 and 139 control the ates 140 an 141 respectively which are pivoted at 142 and 143 respectively.

As the carbon block leaves the retaining walls 120 and 121 it is pushed between the centerin springs 145 and 146 and passes under the contact sprin 147. The block does not make contact with the spring 147 unless it meets some obstruction wherebyl it is jammed and raised out of position; w en thus raised, however, the surface of the block will make contact with this spring which will close a circuit including a circuit breaking mechanism which will be operated and stop the operation of the testing machine as a whole, thereby preventing damage to the machine parts due to the jammed block. The gates 140 and 141 are normally held' by springs 150 and 151 respectively in such a position that a block which passes through the centering springs 145 and 146 will readily pass between these gates and into the reject chute 152. A block entering the reject chute 152 will be carried down said chute on its bottom and then slide to the side horizontally from where it will be turned and dropped on its end into a discharge tube 159' which leads to a suitable receptacle for rejected blocks.

A further description of the apparatus associated with the alloy test system, together with the operation of the circuits associated therewith, will now be described in connection with the circuit diagram illustrated in Fi 27. To simplify the circuit diagram the cafimn block 153 under test is shown in its position on the test plate connected to the contact testing springs 132 and 137 and is also illustrated in another part of the drawing with the paired contact test springs 133 and 134 and 135 and 136 connected to the block.

As the carbon block is pushed forward between the retainin walls 120 and 121 it is first connected to t e contact test spring 132 which completes a circuit which may be traced from the grounded test plate through the carbon block and relay 154 to the negative side of battery. The relay 154 is consequently energized and the negative battery is connected to the make contact of said relay. The block is next passed between the pairs of contacts 133, 134, 135, and 136 which has no immediate effect upon the operation However, as the block advances and he contact test spring 137 is connected to the block, at which time the paired springs 133 and 134 and 135 and 136 are in The relay 155 wi 1 the exact center of the block, a circuit is completed from the ground on the test plate b way of the carbon block and test contact 13 through the rela 155 to negative battery. consequently be operated and this will complete a circuit from negative batter through the armature and make contact 0 relay 154 previously operated, the make contact and armature of relay 155 and then through the two arallel branches composed respectively of tlib paired contact slprings135 and 136 and the relay 156 and t e paired contact springs 134 and 133 and the relay 157 to ground.

The relays 156 and 157 are marginal and will not operate if the circuit just traced is com leted through the carbon surface of the bloc but if either one of the aired contact test springs rest on the fusi le alloy 158, suflicient current will flow in the circuit to operate the marginal relay associated with that pair of contacts. Consequently if the fusible alloy is not properly positioned, or the block is not equipped with the fusible alloy, or the surface contact of the fusible alloy presents a dirty or mutilated surface of a resistance greater than desired, the marinal relays 156 "and 157 will not operate.

he marginal relays 156 and 157 control respectively the operation of the locking relays 160 and 161, which in turn control the operation of the gate controllin electromagnets 139 and 138. .Therefore, i the alloy is not pro erly centered, is missing, or presents a sur ace of low conductivity, neither one of the ates 140 or 141 will be operated, and the bloc will be propelled b one of the pins in the chain 123 to the c ute 152, throu h which it will be carried to a receptacle or defective blocks. Ifthe alloy is roperly centered and resents a surface 01 the desired conductlvity to either of the paired springs 133 and 134 or 135 and 136, the'marginal rela associated with said pair of springs wi I operate.

In the circuit diagram illustrated in Fig. 27, contact springs 135 and 136 are shown in contact with the fusible alloy disk and consequently the marginal relay 156 will be operated. This will complete a circuit which may be traced from battery through the armature and make contact of relay 156, the coil of relay 160, and the cam actuated contacts 165 and 162 to ground. This will cause the actuation 6f the relay 160 which will complete a locking circuit for said relay traceable from batter throu h the armature and make contact and coil 01 said relay, and the cam actuated s rings 165 and 162 to ground. The actuation of the relay 160 will in turn complete a circuit which may be traced from battery through the armature and make contact of said relay and the gate actuating electromagnet 139 and the cam actuated springs 165 and 162 to ground.

tin. with the. side of the block,

' would have been energized in a similar way under test would haveheen and the block 7 deflected into th chute 164. Chutes 163 and 164 unite at their ends in" a common chute 159. The rated to 141 will remain in its displace position until the locking-circuit for the relay 160 is interrupted. e a continuity of this circuit is controlled by the V cam actuated spring 162 which breaks conis. so' designed that the s nection with t e contact spring 165 once for each" revolution of the sprocket 125, said operation being controlled by the cam 166-and the roller 167 associated with the spring 162 which rides on the periphery of said cam. The chain drive for the lock and the cam 166 will rsvo ve in such a manner that the depression in the cam 166 will coiiperate with the roller 167 of the spring 162 immediately after the block under test has been pro erly directed into the chute associated -wit the particular glate operated. When the roller 16 rests in t e depression 7 of the cam 166, the connection between the I sgrin a le , 169 common opens the I electroma .mentum of the block as: a

springs 162 and 165 is interrupted which circuit of the 're ay 160 ectroof contact of 135 and 136 the relay 160.- and at 139 will de'nergiz and their armatures returned tonormal. e 165 and 162-are inclosed by aisuitood 168 which is providedwith a slitted o hing6 or cam surace 1 As illustrated in Figs. 7 ands, if the moleaves it! drivpain is insuflicientto on it into 'the parr chute. 163- p!- 164, so ected, the par .or 141 in returning to northe action of mal tion under the springs 150 or 151-, as the case may be willpush t e block into the chute below '1; e gate. e chutes 163 and 164 are so constructed that they will give the block a 90"degree turn an will deliver it tho h the agency of the force of gravity onto t e main test plate theconductivity testing mechanism, the surmechanisin, theigaging and the counting face testing mechanism,

and distributing mechanism with the alloy side up. As t e block emerges from the chute 159 it the entire le of this plate y means 0 pins such as 1 0 projectinghfrom the side of an endless chain 17 whi is propelled by is Bicked up and ushed along rocket wheel 125 the introduction of the along the top sur ing underneath said Figs. 1 and 6. After the chute 159 and are 170 they will be move constant, uni

.a sprocket wheel 172 mounted on a shaft 173 face of said plate, returnlate as illustrated in e b ocks emer e from [picked up by t e pins along said .plate form rate of speed and at a are tested as they are moved by the pins through the testing mec Associated with each 0 tems located-on the main test mechanism .whic

'identifyi for all testing mechanisms exce hanisms provided.

f the testing syslate 169 is an is identical pt that the identifying-mechanismv for the conductivity testing nism's associated with system is equi ditional means which wil hereinafter. To avoid repetition in the scription of these testin simplify the description t e nism used for identification Figs. 9, l7, and 18, will be he blocks tested in are placed under ressure they are constant y moving during eac ped with during test,

it is impractical ta eliminate defective at the moment that a defe is the function of the identi .toso identify "each block as'to each test that eted, the block.

passes through has been comp accepted or re ting of the identification mechanism and identifyi struc'i'lcd .t at it will not systems and reof' the mechaas illustrated in described first.

the various mechathe main test plate 169 ct: is detected.

fying mechanism (gluing er t e test will either be jected according to the setmechanism.

system is so coninterfere in any an adso be referred to and as h test blocks as it The way whatsoever with the proper functioning of the testin sary because one eration of the testing terns, will be placed.

lock,

systems, this being necesaccord-ing'to the opmechanisms and sysderv test during the period that another block is Being passed or rejected.

I which project throu 169 and which lie 170 contained in the si Power is consequently wheel 175 by the pins these pins also being blocksaloiig the test rious testing mech Rush the tween the movement test late and the movement riven by 'the wheel 1 Mounted on the shaft 174 is a disk 176,.in the peri hery ofwhich are 9, 180, 181,

mounted ivot of the constant.

'mouuted six levers and 182. and are free plane at ri ht angles disk. The e'vers are The mechanism as illustra a shaft 174 on which is mounted wheel 175 which is equip gh-a 17 178, 17 These levers are to turn about said p d with ted consists of six teet at in the'test plate in the path of the pins do of the chain 171.

transmitted to of the test chain 171,

said

utilized to push the of .the

of the pivotally to the plane plate through the va Since the pins which propel the wheel 175 also serve to blocks on the test plate, the relation blocks on the shaft 75 will 5 remain ina under the control ;-of

tated around this cam and the coil 186 wfil spiral springs attached to the rearwardly extending portion of each lever and to a hub 183 and tend to take a position at an angle with the axis of the disk with the rear end of the lever inclined toward said axis. 1 As each of these levers is moved to the space occupied by lever 180, as shown in Fig. 18, by the revolution of the disk 176 it will assume the inclined position as indicated for levers 180 and 181. As the disk 176 is revolved the forward end of the lever is displaced toward the disk axis by a cam surface 184, this cam surface being so designed that the forward end of a declined lever will be moved under the protruding cam surface. As each lever is rosurface it will gradually assume a horizontal sition parallel to the axis of the disk, whic wilbbe the position of each lever when it reaches the end of said cam surface. As the levers leave the end of the'cam surface 185 they pass into a magnetic field produced by a coil 186 are dependent for their horizontal position upon this magnetic field. The extreme rear end of each lever in this position acts as an armature for this coil, and when the lever is in its horizontal position it completes a magnetic circuit between the magnetic yokes 187 and 188, said ma netic circuit being composed completely 0 soft iron except for the two extremely small air gaps between thelever and these two yokes. The magnetic field produced 'by the coil 186 is sufliciently strong'to hold the lever parallel to the disk axis against the action of the lever spring.

Thetesting mechanisms used to conduct the'various tests are so timed with relation to the identifying apparatus that the test on a given block which is being pushed through the system will start at the moment that one of the levers leaves the end 185 of the cam surface. During the period that the block is bein tested the lever remains in the range of t e magnetic field, this interval being visual'zed in Fig. 18 by the space included between the radial lines 189 and 190. When the block which is bein I tested successfull meets the tests applied the magnetic field developed by the coil 186 remains permanent and the lever which is identified therewith retains its horizontal position. If, however, a defect in the block is encountered by the test system, means hereinafter to be described cause the interruption of the magnetic field produced by the coil 186, and consequently the lever under the influence of its coiled spri will immediately assume its inclined position to the disk axis. When the defective portion of the block has passed out of the control of the testing mechanism and said mechanism is again testin a sound portion of the block again be energized, thereby 'reproducin the ma netic field; but this reroduced eld whii e snfiiciently strong to old a lever in its horizontal position is not strong enou h to overcome the action of the spring w ich holds the lever, due to the increased air gap between the coil core and the lever.

When a lever which is in the horizontal position reaches the position of the radial line 190, which position corresponds to the completlon of the test of a block, it will ride under a shoulder 192 on the metallic plate 193 which is pivoted at 194. This plate is normall held against a sto 199 mounted on the fiber section 195 of the disk 196 by the coiled spring 197. The plate 193 and its associated shoulder 192 is used to prevent jamming, which might result if a lever were released to its inclined position at the time that it was about to ride under the shoulder 192. Under such conditions the lever would rise part way and, due to-the rotation of the disk 176, its side would strike the shoulder 192, and this would bend or break the lever unless a suitable yielding means is provided. The plate 193 serves this purpose by swinging around its pivot 194 against the tension of the spring 197, the shoulder 192 being gradually moved out of the path of the lever which has become jammed and the lever finally released.

owever, in the normal operation of the machine the lever in its horizontal position will ride under the shoulder 192, from where it will be passed under the shoulder 198 of the disk sector or segment 195. The lever will ride under this shoulder 198 and will leave this shoulder to pass under the contact sprin 200 at the osition indicated by the radial line 201. he period of time consumed by the lever in passi from the radialline 190 to the radial line 201 is the same as that required for the block under test in moving from the testing mechanism to an electromagnetically controlled means which determines whether the block will be accepted or rejected because of the electrical registration of the testin mechanism during the period that the bloc was under test.

As the lever makes contact with the contact spring 200 a circuit is completed which will actuate an electroma netic means to ass or accept the block. owever, if the ever reaches the radial line 190 in its inclined position it will pass over the upper surface of the disk sector 195, and the electromagnetic accepting means will remain inert and the block Wlll be rejected. As the levers leave the contact spring 200 they assume their inclined position and as the disk 176 is rotated they again come under the infiuence of the cam surface 184 which mechanically resets the levers to their. horizontal osition.

e testing systems are designed so that 

